Pilsbry, H. A. & Olsson, A. A. (1935). Tertiary fresh-water mollusks of the Magdalena Embayment, Colombia. Proceedings of the Academy of Natural Sciences of Philadelphia. 87: 7-39.
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Pilsbry, H. A. & Olsson, A. A.
1935
Tertiary fresh-water mollusks of the Magdalena Embayment, Colombia
Proceedings of the Academy of Natural Sciences of Philadelphia